This whole issue boils down to semantics and how we count and use numbers. The first issue is what is a harmonic. A harmonic is a multiple of the fundamental.
This can be seen when we look at the Fourier series: V(t) = a(0) + a(1)sin(wt) + a(2)sin(wt) + a(3)sin(wt) + ... where a(n) is the magnitude of the n-th term in the series and w is angular frequency (radians/sec) Then the 0-th term would represent any "DC" component present, the 1-th (or 1-st) would represent the fundamental, and the 2-th (or 2-nd) would represent 2 times the fundamental, or the second harmonic, etc. If we refer back to the series, and refer to the n-th term, we would all be on the same page (and harmonic). John Shinn, P.E. -----Original Message----- From: [email protected] [mailto:[email protected]]On Behalf Of [email protected] Sent: Monday, December 17, 2001 7:52 AM To: [email protected]; [email protected]; [email protected] Cc: [email protected]; [email protected]; [email protected]; [email protected] Subject: Re: 2 Phases in North America Mike, I don't go with you on this one... 0 implies nothing ( prehaps 0 ac ) ... therefore the "0th" harmonic is dc....??? if a squarewave is made up of "odd" harmonics, we would have to rethink that, correct? Derek. ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
